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Old 09-08-2013, 03:40 PM   #30
Purdy Swoft
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Join Date: May 2010
Location: Alabama
Posts: 8,099
Default Re: Alternator vs. generator?

Phil, If you've got a battery charger or jump start device you can easily test the generator yourself. When they are off, I usually lay them in a vise for convience but not necessary. Connect the negative connection to the generator terminal post. connect the positive cable to the genetator mounting bracket as a ground. The generator will turn slowly in the direction that the engine turns when its running if the generator is good. Don't be fooled by a bad connection. Paint can cause problems with ground connection. You may have to jiggle the connections to get good contact. If all you've got handy is 12 volt, that will work with no problem. If the generator is on the car you will need to remove the fan belt. The generator motors weakly and won't be able to turn the engine in this test. If it motors in the correct direction you should be good to go untill you can get your EVR. Be sure that you ground with the positive cable or you can reverse the polarity in the generator. Model A's are positive ground. If it has a diode cutout remove it before testing with 12 volt .

Last edited by Purdy Swoft; 09-08-2013 at 08:38 PM. Reason: spelling
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